Large information repositories, such as the World Wide Web or Usenet News, ooer an amazing wealth of information. Searching for valuable information is an eeort that permanently occurs in organizations and that contributes to the organizational memory. Active collaborative ltering builds on the exploitation of the results of this eeort by encouraging the members of an organization to share info...

In this paper, we overview the current status of research in the field of collaborative sensing for urban transportation. We first classify the different types of sensors that can be relevant in collaborative urban sensing and then we analyze three different topics: parking spaces, traffic, and trajectories. We discuss issues regarding the sensing and data sharing approaches as well as relevant...

This paper considers the problem of matrix completion, when some number of the columns are arbitrarily corrupted. It is well-known that standard algorithms for matrix completion can return arbitrarily poor results, if even a single column is corrupted. What can be done if a large number, or even a constant fraction of columns are corrupted? In this paper, we study this very problem, and develop...

Recommendation plays an increasingly important role in our daily lives. Recommender systems automatically suggest to a user items that might be of interest to her. Recent studies demonstrate that information from social networks can be exploited to improve accuracy of recommendations. In this paper, we present a survey of Collaborative Filtering(CF) based social recommender systems. We provide ...

Groupware systems let physically dispersed teams collaborate on common tasks over distance and time. A real-time groupware system requires all users to be present at their respective sites at the same time. A non-real-time groupware system, however, lets users work on common tasks at different times. Real-time collaborative editing systems that enable groups of geographically distributed users ...

Collaborative logistics is increasingly emerging as a new opportunity for cost reduction through internal and cross chains coordination. This paper presents different coordination mechanisms to support collaborative logistics. These mechanisms are differentiated by their planning function, their sharing approach and the information, decision and financial flows. Often, the logistics planning is...

Well-informed network participants are a necessity for successful collaboration in business networks. The widespread knowledge of the many aspects of the network is an effective vehicle to promote trust within the network, successfully resolve conflicts, and build a prospering collaboration climate. Despite their natural interest in being well informed about all the different aspects of the net...

For several years, Value Systems have been studied by two distinct scientific disciplines: economy and psycho-sociology. Each discipline developed a different concept of Value System, based on distinct assumptions about value. On one hand, economists assume that value means how much (usually money) a product or service is worth to someone, relative to other things; on the other hand socio-psych...